I Need Help to know Chemistry if this Ore.

[minero74]

I was Hiking to hills there are few abandoned mines and I found an adit that i never seen before and found a little pile of ore
that place is well kwon to have silver mines and gold mines
can anyone help me to know the chemistry of those rocks,thanks

I will post some pictures of those rocks

 

[minero74]

here are those ore picture

 

[goldshark]

Looks like sulfides within a granitic host rock, definitely hydrothermal deposition. Pretty basic stuff, and that is about all I can say before spending a lot of my time on the subject. If you want to know more, you will either have to send to a lab for analysis, or learn to do it yourself. Most intelligent people will have it fire assayed first, as XRF, which is cheaper, but gives many false readings, is throwing good money after bad. Sulfides have a tendency to give high readings in the PGM group, using an XRF.
Your ore looks much more promising for metals then some posted here. Before assaying, you should do a search on the property to determine if it is filed on.

 

[minero74]

Thanks for the advice my Friend
I will try to found a place to do the assay
i hear there is one In Tucson Arizona

is a very old mine,i read that most of the mine around here dated from the 1920+
i check it out the area
and I dont see any sign or stack
i get inside the adit and is not deep

i wonder why they abandoned ?

i found a vein neitherby i crush few rocks
and inget few pickers
i wil attach the picture

 

[minero74]

I crush the rocks, I panned
and get few pickers

thats from a vein,5 meters from the adit
is parallel to the adit

 

[Yggdrasil]

Thanks for the advice my Friend
I will try to found a place to do the assay
i hear there is one In Tucson Arizona

is a very old mine,i read that most of the mine around here dated from the 1920+
i check it out the area
and I dont see any sign or stack
i get inside the adit and is not deep
i found a vein neitherby i crush few rocks
and i get few pickers
i wil attach the pictures

Do not repeat the information.
If it belongs in the same post just add the pictures with a note that it belongs to the other post.
Or better add the first time.

 

[minero74]

I got it
I apology for it,Ty

 

[minero74]

working on those rocks

 

[Yggdrasil]

working on those rocks

Have you had an assay so you know there is no Arsenic, Mercury or other bad substances there?

And why do you use a spoon for the Stannous, much more readable in a paper or cotton bud.
Next, please do some text as well, pictures are nice but unless they are accompanied by some explanations we are in the dark.

 

[minero74]

Sure i forgot to explain what I was doing.

I don’t do assay yet,because i very busy right now and I don’t have time go there is a long drive from my home.

What i was doing is
Crush to ore to a fine powder
I add destilled water and 30 of HCL
put it in the hot for 1 hour
add some drops of sulfuric acid

decant the solution into my waste bucket
wash with water 5 time

then I add 250 ml HCL and add 1 spoon of Potassium nitrate
heat for 30 minute
add few drops of sulfuric acid

cotton filter
test it with stannous chloride

Denox with urea ,I was thinking to Use
Sulfamic acid,but it was late and i was not up to heat the solution again to add the sulfamic acid.

next morning I filter again,because i think there was silver chloride in the solution
white stuff in the bottom of the beaker

I add destilled water,i guess is was too much water,so i add 10 ml of Hcl more

i add SMB to precipitate and i left it for 24 hrs
next i see some precipitation

i save it until i get some more to do the melting

 

[Yggdrasil]

Sure i forgot to explain what I was doing.

I don’t do assay yet,because i very busy right now and I don’t have time go there is a long drive from my home.

What i was doing is
Crush to ore to a fine powder
I add destilled water and 30 of HCL
put it in the hot for 1 hour
add some drops of sulfuric acid

decant the solution into my waste bucket
wash with water 5 time

then I add 250 ml HCL and add 1 spoon of Potassium nitrate
heat for 30 minute
add few drops of sulfuric acid

cotton filter
test it with stannous chloride

Denox with urea ,I was thinking to Use
Sulfamic acid,but it was late and i was not up to heat the solution again to add the sulfamic acid.

next morning I filter again,because i think there was silver chloride in the solution
white stuff in the bottom of the beaker

I add destilled water,i guess is was too much water,so i add 10 ml of Hcl more

i add SMB to precipitate and i left it for 24 hrs
next i see some precipitation

i save it until i get some more to do the melting

The spoon do not look decisive positive for Gold. Wrong color.
Use paper or cotton bud, much easier to interpret.
If it is too dark, dilute with water and try again.

 

[minero74]

It is quite difficult to see the color
because it was dark

but it was Black/purple
increase the size of the picture
You will notice the color

I usually do the process again
to get the gold precipitation more clean

Thanks for the advice

 

[Yggdrasil]

It still looks wrong, maybe too dirty.
Here is how it should look.

 

[Lino1406]

The spoon do not look decisive positive for Gold. Wrong color.
Use paper or cotton bud, much easier to interpret.
If it is too dark, dilute with water and try again.

Brown precipitate can be cuprous sulfite

 

[minero74]

I do understand it was late at night
and i quite difficult to see the purple color
i think this one look bit better

 

[Yggdrasil]

I do understand it was late at night
and i quite difficult to see the purple color
i think this one look bit better

Please use paper or cotton buds.
It is very hard to interpret the colours in a spoon. Take a ml and put it in a small container, add 2 ml of water, check again. If it still is dark add 2ml more until you have a colour that is not obfuscated by dark particles.

 

[Alondro]

Brown precipitate can be cuprous sulfite

Brown is tricky. I've had brown with gold in a solution with absolutely no sulfur at all, just chlorides. Older stannous will often give brownish color with a purple tint.